<template>
    <div>
      <!-- 面包屑导航区域 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>

      <!-- 卡片视图 -->
      <el-card>
        <el-row>
          <el-col>
              <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
          </el-col>
        </el-row>

        <!--  角色列表区域 -->
        <el-table :data="rolelist" border stripe>
          <!-- 展开列 -->
          <el-table-column type="expand">
            <template slot-scope="scope">
              <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children"
              :key="item1.id">
                <!-- 渲染一级权限 -->
                <el-col :span="5">
                  <el-tag closable
                  @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!-- 渲染二级和三级权限 -->
                <el-col :span="19">
                  <!-- 通过 for 循环 嵌套渲染二级权限 -->
                  <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children"
                  :key="item2.id">
                    <el-col :span="6">
                      <el-tag type="success" closable
                      @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <el-col :span="18">
                      <el-col>
                        <el-tag type="warning" :class="i3 === 0 ? '' : 'bdtop'" v-for="(item3, i3) in item2.children"
                      :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                      </el-col>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>
            </template>
          </el-table-column>
          <!-- 索引列 -->
          <el-table-column type="index"></el-table-column>
          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleName"></el-table-column>
          <el-table-column label="操作" width="300px" prop="roleName">
            <template slot-scope="scope">
              <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
              <el-button size="mini" type="danger" icon="el-icon-deleteh" @click="removeRoleById(scope.row.id)">删除</el-button>
              <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>

      <!-- 添加用户的对话框 -->
      <el-dialog
        title="添加角色"
        :visible.sync="addDialogVisible"
        width="50%"
        @close="addDialogClosed"
        :close-on-click-modal='false'>
        <!-- 内容主体区域 -->
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px">
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="addForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="addForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <!-- 底部区域 -->
        <span slot="footer" class="dialog-footer">
          <el-button @click="addDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addRole()" >确 定</el-button>
        </span>
      </el-dialog>

      <!-- 编辑角色的对话框 -->
      <el-dialog
        title="编辑角色"
        :visible.sync="editDialogVisible"
        width="50%"
        @close="editDialogClosed"
        :close-on-click-modal='false'>
        <!-- 内容主体区域 -->
        <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="80px">
          <el-form-item label="角色id" prop="id">
            <el-input v-model="editForm.id" disabled></el-input>
          </el-form-item>
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="editForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="editForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <!-- 底部区域 -->
        <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editRoleInfo()" >确 定</el-button>
        </span>
      </el-dialog>

      <!-- 分配权限的对话框 -->
      <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="40%"
        @close="setRightDialogClosed"
        :close-on-click-modal='false'>
        <el-tree :data="rightslist" :props="treeProps"
        show-checkbox node-key="id" default-expand-all
        :default-checked-keys="defKeys" ref="treeRef"></el-tree>
        <span slot="footer" class="dialog-footer">
          <el-button @click="setRightDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
      </el-dialog>
    </div>
</template>

<script>
export default {
  data () {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 添加角色对话框的显示和隐藏
      addDialogVisible: false,
      // 添加角色表单的数据对象
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加表单的验证规则对象
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { message: '请输入角色描述', trigger: 'blur' }
        ]
      },
      // 编辑角色对话框的显示和隐藏
      editDialogVisible: false,
      // 编辑角色表单的数据对象
      editForm: {
        id: '',
        roleName: '',
        roleDesc: ''
      },
      // 编辑表单的验证规则对象
      editFormRules: {
        id: [
          { required: true }
        ],
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { message: '请输入角色描述', trigger: 'blur' }
        ]
      },
      // 控制分配权限对话框的显示和隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色数据失败！')
      }
      this.rolelist = res.data
      console.log(this.rolelist)
    },
    // 添加角色事件
    addRole () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return
        }
        // 可以发起添加用户的网络请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          return this.$message.error(res.meta.msg)
        }
        this.$message.success(res.meta.msg)
        // 隐藏添加用户的对话框
        this.addDialogVisible = false
        // 重新获取用户列表数据
        this.getRolesList()
      })
    },
    // 监听添加角色对话框的关闭事件
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
      this.$refs.addFormRef.clearValidate()
    },
    // 显示编辑表单并获取角色id
    async showEditDialog (id) {
      this.editForm.id = id
      this.editDialogVisible = true
    },
    // 编辑角色事件
    editRoleInfo () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) {
          return
        }
        // 发起修改用户信息的数据请求
        const { data: res } = await this.$http.put('roles/' + this.editForm.id, this.editForm)
        if (res.meta.status !== 200) {
          return this.$message.error(res.meta.msg)
        }
        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getRolesList()
        // 提示修改成功
        this.$message.success(res.meta.msg)
      })
    },
    // 监听编辑对话框的关闭事件
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
      this.$refs.editFormRef.clearValidate()
    },
    // 通过角色id删除角色
    async removeRoleById (id) {
      // 弹框询问用户是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
          center: true
        }
      ).catch((err) => err)
      // 如果用户确认删除，则返回值为字符串 confirm
      // 如果用户取消了删除，则返回值为字符串 cancel
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.$message.success(res.meta.msg)
      this.getRolesList()
    },
    // 根据Id删除对应的权限
    async removeRightById (role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除！')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }

      // this.getRolesList()
      role.children = res.data
    },
    // 显示编辑表单并获取角色id
    async showSetRightDialog (role) {
      this.roleId = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限失败！')
      }
      // 把获取到的权限数据保存到data中
      this.rightslist = res.data

      // 递归获取三级节点Id
      this.getLeafKeys(role, this.defKeys)

      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKey 数组中
    getLeafKeys (node, arr) {
      // 如果当前node节点不保存children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }

      node.children.forEach(item =>
        this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      console.log(idStr)
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-top: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
